Let's divide 78519412 by 781
The aim is to understand the frequency of 781 in 78519412.

Advancing to step 1:
7 divided by 781 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 781

Let's proceed to step 2:
When dividing 78 by 781, we get 0 with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Bring next digit (5) of the dividend behind the 78 and repeat the process: 785 / 781

Advancing to step 3:
If we divide 785 by 781, we get 1 and a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 781 from 785 and we're left with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 781

Going ahead to step 4:
When dividing 41 by 781, we get 0 with a remainder of 41.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 41, we get 41.
Append the next digit (9) from the dividend to 41 and continue with: 419 / 781

Going ahead to step 5:
781 goes into 419 0 times with a remainder of 419.
The next digit of our result is 0. 
Result so far: 100.0
If we take 0 away from 419, we end up with 419.
Grab the next digit (4) from the dividend, add it to 419, then carry on: 4194 / 781

Let's proceed to step 6:
781 goes into 4194 5 times with a remainder of 289.
Use 5 as the next digit of our solution. 
Result so far: 1005.0
The remainder is 289 after subtracting 3905 from 4194.
Bring next digit (1) of the dividend behind the 289 and repeat the process: 2891 / 781

Advancing to step 7:
2891 divided by 781 is 3 with a remainder of 548.
Use 3 as the next digit of our solution. 
Result so far: 10053.0
Subtracting 2343 from 2891 leaves us with 548.
Take the next digit (2) from the dividend and append it to 548, then repeat: 5482 / 781

Step 8:
When dividing 5482 by 781, we get 7 with a remainder of 15.
The next digit of our result is 7. 
Result so far: 100537.0
Subtracting 5467 from 5482 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
When dividing 150 by 781, we get 0 with a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 100537.0
The remainder is 150 after subtracting 0 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 10:
When dividing 1500 by 781, we get 1 with a remainder of 719.
The number 1 becomes the next digit in our result. 
Result so far: 100537.01
If we take 781 away from 1500, we end up with 719.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7190, and continue the process.

Advancing to step 11:
The number 781 fits into 7190 9 times, leaving a remainder of 161.
Put 9 as the next digit of the answer. 
Result so far: 100537.019
The remainder is 161 after subtracting 7029 from 7190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Let's proceed to step 12:
The number 781 fits into 1610 2 times, leaving a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 100537.0192
The remainder is 48 after subtracting 1562 from 1610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 13:
The number 781 fits into 480 0 times, leaving a remainder of 480.
The next digit of our result is 0. 
Result so far: 100537.0192
Subtracting 0 from 480 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 14:
If we divide 4800 by 781, we get 6 and a remainder of 114.
Record the quotient 6 as the next digit in the result. 
Result so far: 100537.019206
If we take 4686 away from 4800, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Going ahead to step 15:
781 can be fit into 1140 1 times, resulting in a remainder of 359.
Record the quotient 1 as the next digit in the result. 
Result so far: 100537.0192061
Deduct 781 from 1140 and we're left with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Advancing to step 16:
781 can be fit into 3590 4 times, resulting in a remainder of 466.
The next digit of our result is 4. 
Result so far: 100537.01920614
If we subtract 3124 from 3590, we get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

The final result is 100537.01920614 with a remainder of 4.66e-07.